What do these 2 Ghidra warnings mean?

When disassembling ARM binaries in Ghidra, I often see these warnings:

                /* WARNING: Could not recover jumptable at 0x0747c198. Too many branches */
                /* WARNING: Treating indirect jump as call */

What do they mean? What’s the underlying architectural concept I should learn about to understand the cause of these issues?

Here’s an example from a real program, seen in Ghidra’s disassembly:

    if (param_2 == 0x78) {
                /* WARNING: Could not recover jumptable at 0x0747c198. Too many branches */
                /* WARNING: Treating indirect jump as call */
      uVar3 = (*DAT_0747c19c)();
      return uVar3;
    }