Sorry for “spam” but I finally found the “solution”. When the error comes, I have to delete caches → “empty all caches” in my plugin to It was OK again. But I can′t do it everytime again and again. I tried to delete some folders in wp-content/caches but they got created by the system again. How to pernamently delete them or fix that problem? Thanks for you ideas!
P.S. I attached a screenshot again, I hope you will watch it.
Best regards.
