Question: serious problem. Integrate do not work after installing latest Physics update

I just  found what seems to be a serious problem and I am not able to figure if it is related to my own installation or not.

After I installed Physics 426 (Published on Sept 17, 2019) using the Maple GUI install button (which now works for my PC), I found I am not able to integrate basic things.

It seems to affect int when using some build in function with definite integration, but it could be others also. I need to test more. 

Could someone see if they get same problem as well?  

Could also someone please remind me of the library  commands to issue in order to remove current Physics version 426 and install earlier Physics version package, say 425, or any other version, so that  to see if this is related to version of a physics package or not?



 User Interface: 1399874
         Kernel: 1399874
        Library: 1399874



`Standard Worksheet Interface, Maple 2019.1, Windows 10, May 21 2019 Build ID 1399874`


`The "Physics Updates" version in the MapleCloud is 426 and is the same as the version installed in this computer, created 2019, September 20, 23:28 hours, found in the directory C:\Users\me\maple\toolbox\2019\Physics Updates\lib\`

infolevel[int] := 3:


Definite Integration:   Integrating expression on x=0..1

Definite Integration:   Using the integrators [distribution, piecewise, series, o, polynomial, ln, lookup, cook, ratpoly, elliptic, elliptictrig, meijergspecial, improper, asymptotic, ftoc, ftocms, meijerg, contour]
LookUp Integrator:   unable to find the specified integral in the table
int/elliptic: trying elliptic integration
Integration Warning:   Integration method ftoc encountered an error in IntegrationTools:-Definite:-Main:
 mismatched multiple assignment of 2 variables on the left side and 1 value on the right side

Definite Integration:   Returning integral unevaluated.

int(exp(x), x = 0 .. 1)



int(sin(n*x), x = 0 .. Pi)


int(tan(x), x = 0 .. Pi)


int(cos(x), x = 0 .. 1)

int(sin(x),x=0 .. Pi)

int(sin(x), x = 0 .. Pi)



int(x,x=0 .. 1)




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