Invalid templateid specified - Ads module

[cirdok2]

Since yesterday, anytime I want to change ads (and click on Save), I receive an
"Invalid templateid specified" error.

I am running 5.5.1 and error suddenly appeared, until then I was able to modify ads.
Note, that only appears in "manage ads" window, not "Module configuration".
I tried to remove an ad, move around, create back, etc.

Thanks.

[cirdok2]

any idea?
I have been using vbulletin for over 12 years, but I am not sure if these boards are like they used to be. They have made a huge difference in the past to keep using it and not competitors.

[delicjous]

What PHP-Version are you using?
Look here: https://www.vbulletin.com/forum/forum/vbulletin-5-connect/vbulletin-5-connect-questions-problems-troubleshooting/vbulletin-5-site-builder/4401000-invalid-templateid-specified-if-you-followed-a-valid-link-please-notify-the-administrator?p=4401074#post4401074

Do you block any javasript or ads?