Deprecated function: trim(): Passing null to parameter #1 ($string) of type string is deprecated in InstapageCmsPluginHelper::extractSlug()

Patch attached

Updated patch attached with more fixes

Hello @alex.skrypnyk

we reviewed your patch and it works, however, we cannot directly apply it here because it's common core for our other modules, so we need to commit it in our internal repository and deploy the new Drupal Plugin version from there.

Do you want to be mentioned in the change log as an author of the bug fix to be transparent about your contribution?

Thanks for your time!