1. Technology search in the mod GUI doesn't work.
2. When I put some tech with a few not researched prerequisites, after researching 1 of them some "Dummy" research appeared, whilst there's no research with such name at all. Sadly, couldn't reproduce it yet, so have no idea what that could be.

Thanks for the report.

For the first item, can you provide steps to reproduce, or be a bit more descriptive with what you mean with "doesn't work"?

For the second item, does the dummy research persist in the in-game queue? Also, is it the only technology in the in-game queue?

For the first item, can you provide steps to reproduce, or be a bit more descriptive with what you mean with "doesn't work"?

If I got the idea right, that bar should serve for searching among techs, for me it doesn't work in general, tried both russian and english clients, as well as seraching on both languages. None worked.
https://imgur.com/a/1ygNtXc

For the second item, does the dummy research persist in the in-game queue? Also, is it the only technology in the in-game queue?

Yeah, it was the only technology in the in-game queue. Don't remember all the details. It was researching that not existing tech, and also it was removed from the in-game queue as soon as I removed the final research from your queue.

Update on 2nd item. It surely was yours rqm-dummy-technology.

For the search functionality I only programmed/tested it for alphanumerical characters, but I updated it to work with any kind of characters in v0.3.1

For the dummy tech I added some additional handling which I think should prevent it from being persistent. Please let me know if you encounter this again.

For the search functionality I only programmed/tested it for alphanumerical characters, but I updated it to work with any kind of characters in v0.3.1

The problem still persists (and appears it's multiplayer problem, it's all good in singleplayer).
Russian characters work fine.
Would be nice to make search case insensitive though.

We're getting closer and closer to the problem :)
The multiplayer problem should be solved in v0.3.2, for the lowercase I need to implement a specific function as the standard Lua libraries only work on alphanumeric characters.

In v0.4.0 I implemented a functionality for searching on non-alphanumeric characters, which has to be enabled in the (new) settings tab