How to address PHP notices on plugin-install.php ?

I’ve suddenly commenced seeing these PHP notices at the leading of my Incorporate Plugins page… https://preview.redd.it/nzp0p394tvq81.png?width=2174&structure=png&vehicle=webp&s=619b2278c76caadaa880e62682adabcf97b73e59 Items I have completed: * Disabled all plugins. * Changed theme. * Deleted transients. * Reinstalled 5.9.2. * Logging-out and -in. * Clearing out the plugins listing. * Functioning the web page with the [Safe Mode plugin](https://wordpress.org/plugins/harmless-manner/) enabled (ie. …

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