We have Error #2046 appearing on our custom application software. This was reported by all customers and appearing on all browsers.
The workaround has been to follow the instructions at the following link:
Any idea what caused this issue?
You've probably already heard, but this was caused by the five year certificates expiring on your local server(s). The copies on fpdownload.adobe.com were signed (after the initial SDK was released) with ones valid until 2025 and beyond. In addition, the current Flex SDK's available on adobe.com also contain RSL's (swz) files valid until 2026.