According to Revive Adserver v3.2.0 release notes this version adds new Javascript based asynchronous tags.
I use javascript tags on my sites to serve ads. Before installing, do I need to change those invocation codes to make them work with the new version?
I have the same errors on version 3.0.3.
Edit:
I managed to solve the problem this way:
make a backup of database and files just in case
disable all plugins from the plugins tab of administration panel
uninstall all plugins from the same panel
delete every file in adserver/plugins except .htaccess
install each plugin from the same panel getting the zip file from adserver/etc/plugins