Error in Plesk: License: Expected ',' or '}' after property value in JSON

[senthil]

Symptoms

• The following error is seen in Domains page of Plesk interface:
  License: Expected ',' or '}' after property value in JSON at position 52 (line 1 column 53)
• Extension WebTotem Security with a paid license is installed

Cause
The WebTotem Security license body is corrupted.

Resolution

• Login to Plesk
• Retrieve the license key via Tools & Settings > License Information