Getting Error on Class Webmozart/Assert/Assert

Thank you so much for this module, it's one I have been waiting for, for quite a while.

I added the module as instructed and added a new time range to one of my content types. When saving the node the site goes to The website encountered an unexpected error. Please try again later.

I get the following in the watchdog:
Error: Class 'Webmozart\Assert\Assert' not found in Drupal\time_field\Time->__construct() (line 46 of /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/modules/time_field/src/Time.php) #0 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/modules/time_field/src/Time.php(142): Drupal\time_field\Time->__construct('05', '00', 0) #1 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/modules/time_field/src/Element/TimeElement.php(50): Drupal\time_field\Time::createFromHtml5Format('05:00') #2 [internal function]: Drupal\time_field\Element\TimeElement::valueCallback(Array, '05:00', Object(Drupal\Core\Form\FormState)) #3 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Form/FormBuilder.php(1254): call_user_func_array(Array, Array) #4 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Form/FormBuilder.php(990): Drupal\Core\Form\FormBuilder->handleInputElement('node_ttslo_form', Array, Object(Drupal\Core\Form\FormState)) #5 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Form/FormBuilder.php(1060): Drupal\Core\Form\FormBuilder->doBuildForm('node_ttslo_form', Array, Object(Drupal\Core\Form\FormState)) #6 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Form/FormBuilder.php(1060): Drupal\Core\Form\FormBuilder->doBuildForm('node_ttslo_form', Array, Object(Drupal\Core\Form\FormState)) #7 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Form/FormBuilder.php(1060): Drupal\Core\Form\FormBuilder->doBuildForm('node_ttslo_form', Array, Object(Drupal\Core\Form\FormState)) #8 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Form/FormBuilder.php(1060): Drupal\Core\Form\FormBuilder->doBuildForm('node_ttslo_form', Array, Object(Drupal\Core\Form\FormState)) #9 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Form/FormBuilder.php(561): Drupal\Core\Form\FormBuilder->doBuildForm('node_ttslo_form', Array, Object(Drupal\Core\Form\FormState)) #10 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Form/FormBuilder.php(318): Drupal\Core\Form\FormBuilder->processForm('node_ttslo_form', Array, Object(Drupal\Core\Form\FormState)) #11 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Entity/EntityFormBuilder.php(48): Drupal\Core\Form\FormBuilder->buildForm('node_ttslo_form', Object(Drupal\Core\Form\FormState)) #12 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/modules/node/src/Controller/NodeController.php(113): Drupal\Core\Entity\EntityFormBuilder->getForm(Object(Drupal\node\Entity\Node)) #13 [internal function]: Drupal\node\Controller\NodeController->add(Object(Drupal\node\Entity\NodeType)) #14 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array) #15 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/Render/Renderer.php(582): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #16 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #17 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) #18 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/vendor/symfony/http-kernel/HttpKernel.php(151): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #19 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/vendor/symfony/http-kernel/HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #20 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #21 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #22 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #23 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #24 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/modules/jsonapi/src/StackMiddleware/FormatSetter.php(51): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #25 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\jsonapi\StackMiddleware\FormatSetter->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #26 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(52): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #27 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #28 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/core/lib/Drupal/Core/DrupalKernel.php(666): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #29 /srv/bindings/5823e151c7054261ac362f6b9dc553db/code/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #30 {main}.

Can I provide any additional help to troubleshoot?

Thanks in advance,
Jay