Hello, thank you for your prompt response. I have to give you the good news that J2Store continues, and is more powerful than before. In a short time after the project was resumed, J2Commerce has improved it and made it compatible with J4, J5 and soon J6.
I have passed the concern on to the J2Commerce team and they were able to carry out the installation correctly. It turns out that the INDIGO template had been brought from J3 and had to go through a process of cleaning obsolete extensions. With this process completed, everything works perfectly now.
I now have J2Store 4.0.10 installed on several web pages with Helix Ultimate and SP Page Builder and everything works wonderfully.
Thank you very much.