Troubleshooting

If the device is typing characters but not resulting in the desired outcome (e.g. website/youtube being opened, file being downloaded etc.) then I would suggest to do the following:

• check the language encoding setting of both: device and target PC
• check whether "MultiLang" option is turned on or off (it can only work on Windows)
• open notepad and click on it just before the characters are typed into terminal, this way you will be able to see what commands exactly are being executed. You'll be able to manually copy them one by one into terminal and see their output, most likely 1 of them will fail because of some special character like backslash or quotes being typed incorrectly.

In such case you could create issue on this repository and describe the problem so I can recreate it and possibly adjust the encoding. Make sure to state what OS you used and language settings of both: device and target PC.

If Arduino Pro Micro is not recognized then you could check this video created by Seytonic to see how to reflash it in such case.