Further to the above post. Here are my machine specs in case it helps.
If anyone could confirm whether they are able to get the splines panel spline to work with the curve tool. that would be great, it's still not working for me. I have trieed resetting teh preferences and reinstalling but still no luck. It is working fine for me in 4.9
thanks
Windows
Processor AMD Ryzen 7 3700X 8-Core Processor 3.59 GHz
Driver Vesion 462.31
Installed RAM 63.9 GB
System type 64-bit operating system, x64-based processor
Graphics Card: GeForce RTX 2080 SUPER