Error: Call to a member function getParameter() on null in Drupal\panels_ipe\Form\PanelsIPEBlockPluginForm->getContextsForPath() (line 505 of /var/www/docroot/modules/contrib/panels/panels_ipe/src/Form/PanelsIPEBlockPluginForm.php)

Changes from MR make sense
It will avoid error message about getParameter()

Could it be because of wrong variables ?

Neither of the patches worked for me. Attached a patch I now use which solves the problem for me.
I hope this helps to solves the problem.

Patch in #7 is working for me
(aligning with changes in page_manger since patch from Path has unnecessary query appended is committed)

joseph.olstad → made their first commit to this issue’s fork.