PHP errors were triggered

Hi, Ive used the Easy Photogrphy Portfolio for a while and more recently (maybe after WordPress updates) when I try to add a new portfolio entry or edit old ones this message appears and you can’t view any of the images the entry is just a blank portfolio page:

PHP errors were triggered during an Ajax request. See your browser developer console for details.

I have tried uninstalling and reinstalling, removed the Yoast widget and made sure everything is updated. Forgive me if this is an obvious problem to solve but I’m fairly inexperienced at WordPress. I don’t want to stop using this portfolio but I can’t update it without this issue happening so am a bit stuck. Any help much appriciated at this point

Many thanks!