GitLens extension disappeared

I'm work on Linux Mint: Screenshot of mint version
I have latest version of Visual Studio code: Screenshot of vs code version
After new reload of OS extension GitLens disappeared: Screenshot of problem
I can't see any information in my source code, that provide this extension. Reinstallation this extension or vs code didn't apply any effect. How can i fix it?

For me the problem was for VS Code 1.51.1 and GitLens 11 they have made the Source Control Layout as default and requires the selection of view in order to make it work as before i.e., in the VS Code sidebar (using Mac OS Catalina 10.15.2).

After update:

1. Press cmd+shift+p (ctrl+shift+p on Windows) and type > Gitlens: Show Welcome View and hit enter. This will bring back the GitLens on sidebar. Then click on GitLens icon in sidebar and you will be shown a welcome page similar to screenshot below:

2. Click on Welcome (Quick Setup), this will open the below screen:

3. Scroll to the bottom and then select the view named GITLENS LAYOUT among the two options given:

4. Now click on Close button in GitLens menu that is opened next to VS Code sidebar:

And your GitLens is back!

Update from eamodio/vscode-gitlens issue 516:

Antivirus deleted one of the extension's files. To fix issue on Windows:

• Remove GitLens extension from VSCode
• Reload VSCode
• Close all instances of VSCode
• Delete %userprofile%\.vscode\extensions\eamodio.gitlens-8.5.6
• Open VSCode
• Reinstall GitLens extension

For Mac users:

• remove the extension
• reload vscode
• go to setting.json by pressing cmd+shift+p > open user settings
• delete all entries regarding the extension
• close vs code
• open vscode
• install the extension

Original answer:

Do a right click in the plugin icons column, and see if GitLens is hidden or not:

By selecting GitLens, you would find back your GitLens icon:

The OP anderson confirms in the comments

In issue 516 on Github problem was solved.
This problem was in large count of files, that GitLens extension could not read.
Exclude this path from project's directory solved my problem.