Firewall blocked Heatmap as cross-site-scripting


I’m using ninja firewall: When trying to get heatmaps, they are blocked as a cross-site-scripting:

CRITICAL 111 89.56.xxxxxx POST /wp-content/plugins/matomo/app/matomo.php - Cross-site scripting - [POST:hsr_ev = 13 #sb_instagram { width: 100%; margin: 0px auto; padding: 0px; box-sizing: border-box; } #sb_inst…] -

Now I’m quite unsure what to to: Someone to help me out?

Best regards, Elke