VCenter 6.7: Resizing disk fails with error message

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My VCenter recently failed to resize a disk with error “Invalid operation for device ‘0’”. Here’s how I solved it.

VEEAM failed recently to backup one of your servers. The error message was “Error: Virtual disk size is not a multiple of 1KB.”.
Error: Virtual disk size is not a multiple of 1KB

Checking the disk in our VCenter showed that one disk had a size of 2150.2455550347 gigabyte. Wherever that size came from. No big deal, change the size to a full gigabyte number and your are done.
But this time Vcenter threw an error:
Invalid operation for device '0'

I tried different sizes, but always got the same error message Invalid operation for device ‘0’.
Invalid operation for device '0'

For future references: I was using a VCenter 6.7 Version 6.7.0.30000 with the HTML5 interface.
To solve that issue, I had to use the flex (Flash) client and everything worked perfectly without any error.

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