Check your php configuration and make sure that the module is only loaded once. Very often a php module has already been compiled into the apache2 php module so that there isn’t any requirement to load it as a separate php module again.
I had this exact problem with the following plugins:
I commented out LDAP and FTP successfuly to resolve this problem. But when I commented CURL. The error went away but then I got the following error in my logs.
PHP Startup: Unable to load dynamic library ‘pdo_mysql’ (tried: /usr/lib/php/20190902/pdo_mysql (/usr/lib/php/20190902/pdo_mysql: cannot open shared object file: No such file or directory), /usr/lib/php/20190902/pdo_mysql.so (/usr/lib/php/20190902/pdo_mysql.so: undefined symbol: pdo_parse_params)) at Unknown#0
The PHP module in question relies on a shared library which eaither doesn’t exist in your server or exists in a wrong version. Use e.g. ldd to find out which libraries are required and install any missing ones.