Why does theTOMAAT extension display "not loaded" after downloading?

Support
1

Problem report for Slicer 4.11.20210226 win-amd64: [please describe expected and actual behavior]
As shown in the figure.

微信图片_20220323143549
微信图片_202203231435492538×381 40.1 KB

微信图片_20220323143616
微信图片_202203231436161352×669 35.4 KB

Why?