Error display in Hyper Text Markup Language

Hi! I am seeing error display in Hyper Text Markup Language (HTML). The two figures below appeared on the screen. The second one occurred mainly in Chrome. I don’t really understand what’s going on? It shows an error message in a tooltip. What should I do? Please help me resolve this issue. Thank you!
Figure 1

Figure 2

Error:
<font color =red>Business Process must have at least one outbound edge. </font> | ||||||||
<font color =red> T2 error msg</font> |
