No, you haven't "updated" Apache but you've degraded it by replacing 2.4.61 with 2.4.46.
Automatic HTTPS support for Wampserver started with Wampserver 3.3.2, i.e. with Apache 2.4.58, and it's not certain that it works with Apache 2.4.46.
> something went wrong, which caused me to copy/merge the configuration
> files from the previous version to the new one.
It is clearly explained that all you have to do is press Enter to copy nothing!
Go back to Apache 2.4.61 without copying anything, then delete Apache 2.4.46 (Right-click -> Delete unused versions), quit Wampserver and reinstall Apache 2.4.46.
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Wampserver install files & addons