Thank you.
This is a common issue with the TGMPA library. This is a common library for tracking dependencies between WordPress components (themes and plugins).
Some themes do not load TGMPA correctly because they assume that no other plugin is using that same library.
Simply delete the file wp-content/plugins/wallets-multiadapter/includes/third-party/TGM-Plugin-Activation/class-tgm-plugin-activation.php for a quick workaround. Do the same for all other dashed-slug extensions that you may have installed.
Ideally you should tell the theme developers to load TGMPA only if not previously defined.
kind regards