Paragon Agora map material issue 4.19

why am I getting this for
m_waterfloor
seems to be in the albedo chain OR THE MATERIALS PARAMETER but I can’t figure out where when I cut the wire the errors go away . I’ve tried to change anything that was negative .

[SM5] /Engine/Private/ReflectionEnvironmentComposite.ush(10,15-38): error X4510: maximum ps_5_0 sampler register index (16) exceeded
[SM5] /Engine/Private/ShadingModels.ush(560,15-81): warning X3571: pow(f, e) will not work for negative f, use abs(f) or conditionally handle negative values if you expect them
[SM5] /Engine/Private/ShadingModels.ush(582,15-55): warning X3571: pow(f, e) will not work for negative f, use abs(f) or conditionally handle negative values if you expect them
[SM5] /Engine/Private/ShadingModels.ush(603,24-66): warning X3571: pow(f, e) will not work for negative f, use abs(f) or conditionally handle negative values if you expect them
[SM5] /Engine/Private/HeightFogCommon.ush(33,14-40): error X4510: maximum ps_5_0 sampler register index (16) exceeded
[SM5] /Engine/Private/DeferredShadingCommon.ush(673,14-35): error X4510: maximum ps_5_0 sampler register index (16) exceeded
[SM5] /Engine/Generated/Material.ush(870,2-36): warning X3206: implicit truncation of vector type