Strange Licence Issue

Dear all,

we had some strange licence problem using MS_polymorph, this is the error message:
=====================================================================
This feature is not available. A valid license is required to use it.

Error: #-21 (LP 19.1.0)
License file does not support this version.
Feature: MS_polymorph
Application version > License version: 2018.09 > 2016.12
License path: ****@XXX.XXX.XXX.XXX;C:\Program Files (x86)\BIOVIA\LicensePack\Licenses\msi_SSQ.lic;C:\Program Files (x86)\BIOVIA\LicensePack\share\data\*.lic;
FlexNet Licensing error:-21,126
For further information, refer to the FlexNet Licensing documentation,
available at "www.flexerasoftware.com".
>>>The maintenance date for this license feature
is not valid for this version of the product.<<<

Error: #-96 (LP 19.1.0)
License server machine is down or not responding.
See the system administrator about starting the license server system, or
make sure you're referring to the right host (see LM_LICENSE_FILE).
Feature: MS_polymorph_TokenR
Hostname: XXX.XXX.XXX.XXX
License path: ****@XXX.XXX.XXX.XXX;C:\Program Files (x86)\BIOVIA\LicensePack\Licenses\msi_SSQ.lic;C:\Program Files (x86)\BIOVIA\LicensePack\share\data\*.lic;
FlexNet Licensing error:-96,496



Task terminated : Tue Jul 23 12:25:37 2019
Total CPU time used : 0 seconds

Termination status : Error

============================================

I suppose the problem is due to the fact that all our Windows10 does not support anymore
the MaterialStudio18 so we were forced to move to the release 19, but it seems that now
the MS_Polymorph licence is not valid.
How we can resolve this? we need an update of our Licence?

Thank you for your help
alistar