Upgrading Drupal

I've read some very complex posts on writing drush code to do various migrations etc. All I want to do is import nodes, given I have the same content type structure on my new and old site.

Is there really no export to say CSV and import from CSV that one can use?

Hello,

I am a first-time poster and I am looking for some advice from people who has some experience migrating user access control from D7 to D8.

http://www.conferenceguideuk.com/

Hi, I litterally just upgraded all the modules and theme (Bootstrap) and now the site is loading really badly. Does anyone know a fix? Inside the themes folder I have 2 new folders oldversion-bootstrap and upgraded-bootstrap? It doesn't look like the css link is even on the pages?

This is the error message I am getting after I have updated from Drupal 8.2.7 to 8.2.8 then to 8.3.1 then to 8.3.5.
An AJAX HTTP error occurred.
HTTP Result Code: 500
Debugging information follows.
Path: /update.php/start?id=288&op=do_nojs&op=do
StatusText: Internal Server Error
ResponseText:

Hello,

I'm using drupal7 with webform 3. I made a custom modules which use hook_webform_insert,update,presave.
I must migrate my website to Drupal 8 with Webform, but i don't find anything about hook.
Anybody can help me to find a solution to use hook to Drupal 8.
Thanks a lot
Best regards
Denis

I've upgraded from php5 to php7, and I keep seeing these warning messages in the admin area and even on the front end.