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When using gmail (and maybe at other times too) I get repeated pop-ups stating [JavaScript Application] Exc in ev handl: TypeError: oSAPlg.oRoot.log is not a function. How can I stop this?

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In addition to the above-mentioned pop-up message, sometimes I get the following:

[JavaScript Application] Exc in ev handl: Error: Bad NPObject as private data!

These pop-ups prevent me from doing anything on the computer until I close the pop-up window, which is sometimes quite difficult.

In addition to the above-mentioned pop-up message, sometimes I get the following: [JavaScript Application] Exc in ev handl: Error: Bad NPObject as private data! These pop-ups prevent me from doing anything on the computer until I close the pop-up window, which is sometimes quite difficult.

Chosen solution

Are you using the McAfee Site Advisor? It has been causing that message to appear. Disable it in the Add-on Manager tab > Extensions until McAfee can fix it.

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Chosen Solution

Are you using the McAfee Site Advisor? It has been causing that message to appear. Disable it in the Add-on Manager tab > Extensions until McAfee can fix it.

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I have done as you suggested. I'll see if it helps and revert. Many thanks.

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Tried to check to see if McAfee Site Advisor is enabled... but now the Add-on Manager won't load... opens a new tab, but then just spins. What's going on?

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I'm not computer-literate enough to answer your question, but I can confirm that the solution that was recommended to me has indeed worked, and I have had no problem with these pop-ups for the last week. - Chris.

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@bboyd2

Click on the Extensions item on the left-side when the Addons Manager opens.