Transmission Won’t go out of park

Hi there, our 1994 2.5l hiace wouldn’t get out of its park mode.
It happened on our way to campsite.
Brake fuse works , brake lights work.
Have changed the transmission oil but have been driving 500 miles with no problem.

I got it going out of P by rocking the van while my partner tried to shift it and luckily that worked.
Kept it in N so at least we could come home after the campsite.

But at home once in P can’t get it shifted again.
Can’t press the release buttons in.

What can it be

Hi, just wondering if you found the cause of this?
My SC 94 is stuck in park and I have to use the unlock button everytime.
Have checked all fuses, brakes working fine.
Am now trying to remove plastic around gear stick to take a better look but can’t seem to remove it.
Am looking for a manual which is proving impossible.
Any help would be appreciated

I found out mine is a solenoid and I cannot get one for my 1992 SC KZH1000001293. Any ideas anyone? Is it ok to bypass it? Mechanic says so but I'm unsure.