Yeah, I can confirm. It's likely a false positive. I've submitted it as such; Avast has a form for it:
https://www.avast.com/report-false-positive
You can temporarily turn off the Avast shields to work around the problem by clicking the Avast icon in the system tray area on Windows:
View attachment 377190
Avast can be a little touchy sometimes.
Whether or not 3rd party AV is required/smart etc. I'll leave that to anyone to decide for themselves. Likewise, choice of operating system, browser etc. are personal choices. From a moderator perspective, we may cut such discussions short here on Photrio as they generally don't go anywhere but the ugly underbelly of online human (mis)behavior.