My JA Simpli site keeps telling me I need to update to Joomla 4.3, but the JA Extension Manager needs to update to 2.7.5 to be compatible. When I try to update that Component I get and error message "Class "JError" not found"
today I had a 500 error tring to upgrade by JA extension manager I downloaded 2.7.5 and installed manually without an issue Did you try to update manually?
You can try downloading the latest version and install manually: https://www.joomlart.com/member/downloads/joomlart/free-joomla-extensions/ja-extensions-manager
saguaros Thanks. I had tried that, but got another error. I tried again this evening and it worked beautifully. My 4.3 installed quickly.