When trying to install ECA or Context Stack alone a fatal error takes place "Method Drupal\context_stack\ContextStackTrait::__sleep() cannot take arguments"

I am running the install locally in DDEV. The project is set to PHP 8.0.13, nginx/1.20.2 and mysql Ver 15.1 Distrib 10.5.12-MariaDB. After a restart the fatal error is happening on every page load now. So i am unable to access the logging settings.
Unfortunately I am not a developer and never performed a full trace (also uncertain if it is still possible at this point when every page is leading to a white screen). But i've tried the following. Activated xdebug in ddev and added xdebug_start_trace() in line 157 and xdebug_stop_trace() in line 185 of the ContextStackTrait.php file(see contextstacktrait_sleep.pdf). Please let me know if that helps and is what you were looking for or if i have to target other parts of the code.

and i did one additional test since you've asked about the php version i am using in particular. i've changed the php version from 8.0.13 to 7.4.26 for the ddev project. after a restart the fatal error was gone.

While being on 7.4.26 I've uninstalled all ECA modules and Context Stack. I've then set the error message display to "All messages, with backtrace information" for the site. When you've pushed your two commits to the dev branch I've changed back to 8.0.13 and then tried to install the ECA modules and Context Stack modules at once that lead to the fatal error before. It is working now without any complaints.

But I've did one last check and tried to uninstall all the aformentioned modules again. The ECA and bpmn.io related uninstalled without any complaints. But Context Stack ran into an error (is that the kind of stack trace you were looking for which is more helpful in contrast to the one i've posted yesterday?):

The website encountered an unexpected error. Please try again later.
AssertionError: Failed to assert that "context_stack:account:5dc9b6442bc7569777ce3c3da63d8a11" are valid cache contexts. in assert() (line 31 of core/lib/Drupal/Core/Cache/Cache.php).
assert(, 'Failed to assert that "context_stack:account:5dc9b6442bc7569777ce3c3da63d8a11" are valid cache contexts.') (Line: 31)
Drupal\Core\Cache\Cache::mergeContexts(Array, Array) (Line: 33)
Drupal\Core\Cache\CacheableMetadata->addCacheContexts(Array) (Line: 69)
Drupal\context_stack\ContextCollection->getCacheContexts() (Line: 171)
Drupal\Core\Cache\CacheableMetadata::createFromObject(Object) (Line: 129)
Drupal\context_stack\ContextStack->pop() (Line: 103)
Drupal\context_stack\EventSubscriber\ContextStackControllerWrapperSubscriber->onKernelRequestFinish(Object, 'kernel.finish_request', Object)
call_user_func(Array, Object, 'kernel.finish_request', Object) (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.finish_request') (Line: 207)
Symfony\Component\HttpKernel\HttpKernel->finishRequest(Object, 1) (Line: 193)
Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object, Object, 1) (Line: 245)
Symfony\Component\HttpKernel\HttpKernel->handleThrowable(Object, Object, 1) (Line: 91)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

I'll set the issue to needs work - but not sure if the error is related to the wrong signatures and the newly introduced changes or if it is unrelated.

hm i haven't changed anything. the only change to the environment was by switching back to php 8.0.13 and by changing the error display. aside that i haven't changed anything. or do you refer to something else in regards of changing the environment settings?

and the steps are straightforward and are reproducible ( i am able to install and uninstall context stack again and again and the error takes place on uninstall - tried now 6 times in a row overall always the identical result). the steps:
- if you are on admin/modules and neither ECA, bpmn.io nor Context Stack is installed simply select Context Stack and install the module
- go to admin/modules/uninstall and select context stack and uninstall
- confirm the uninstall
- the aforementioned error takes place but i am able to go directly to admin/modules/ again (just pasted the path in the addressbar) and get the status message that the selected modules have been uninstalled (even though the error page turned up)

additionally i've tried something else afterwards:
- reinstalled the context stack module and went to admin/modules/uninstall, then did a drush cr (since the error message is about caching), then selected the context stack module for uninstall, confirmed the uninstall and the error showed up again. :/