I only get the warning from your second screenshot (no local minimum…).
This warning results due to the fact, that in some cases the influence line does not have a minimum or a maximum.
→ The influence line is horizontal and its derivation is not a real number (or not usable numerically)
→ no maximum or minimum.
So the algorithm behind ella is numerical not able to determine the unfavourable position of the load. The result is that the load is positioned at one of these locations and warning 86 is issued.
In most cases this warning is not relevant for the calculation of the internal forces.
In the cases I know of, the warning was only an indication of such behavior and could always be ignored.
However, I recommend checking the warnings, the corresponding influence line and the resulting internal forces for abnormalities