Strength materials (namely construction mechanics)

Good day. I understand that there are hardly any people on the game site who know how to build diagrams of moments, transverse and longitudinal forces along statically indefinable frames by the displacement method, but still: I undertook to solve the problem to one of my acquaintances. I almost finished it, I start cutting out the nodes and look for longitudinal forces in transverse forces in them and I see such a PPC (on the last page of the photos): in one node there is 1.462 Kn tension, and in the left node, 1.462 Kn - compression. Naturally, in this situation, when constructing the diagram N, complete garbage is obtained (the longitudinal force of the type changes, and this can be so only if a uniformly distributed load q is applied along the bar). Please help me find a way out of this problem, or can you advise the site, where people know this topic?
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