One of the possible scenarios would be another 3rd party datatype triggering the issues

Did you install PCIGraphics.kmod?

'>>' : bit-wise operator supported in GLSL ES 3.00 and above only
'&' : bit-wise operator supported in GLSL ES 3.00 and above only

// find the two closest points
217
vec3[2] closestParmDistIndex = vec3[2](vec3(0, 9e9, 0), vec3(0, 9e9, 0));
'first-class array' : not supported
'[]' : array constructor supported in GLSL ES 3.00 and above only
'=' : array / non-array mismatch
'=' : cannot convert from 'const array[2] of 3-component vector of float' to 'highp 3-component vector of float'
218
float currentParm = 0.0;
219
for (int i = Z ; i < SEGMENTS ; i++) {
'min' : no matching overloaded function found
'=' : cannot convert from 'const mediump float' to 'highp int'
220
vec3 current = path(currentParm);
221
vec3 currentD = p - current;
222
float currentDist = dot(currentD, currentD);
223
if (currentDist < closestParmDistIndex[0].y) {
'y' : field selection requires structure or vector on left hand side
224
closestParmDistIndex[1] = closestParmDistIndex[0];
225
closestParmDistIndex[0] = vec3(currentParm,currentDist,float(i));
'=' : dimension mismatch
'assign' : cannot convert from 'highp 3-component vector of float' to 'highp float'
226
} else if (currentDist < closestParmDistIndex[1].y) {
'y' : field selection requires structure or vector on left hand side
227
closestParmDistIndex[1] = vec3(currentParm,currentDist,float(i));
'=' : dimension mismatch
'assign' : cannot convert from 'highp 3-component vector of float' to 'highp float'
228
}
229
currentParm -= 0.17 / length(pathd(currentParm)) * paths(currentParm);
230
}
231

232
float dOrg = 8.0;
233
float dShe = 8.0;
234

235
albedo = COLOR_SHELL;
236

237
for (int i = Z; i < 2 ; i++) {
'min' : no matching overloaded function found
'=' : cannot convert from 'const mediump float' to 'highp int'
238
float centerParm = closestParmDistIndex[i].x;
'x' : field selection requires structure or vector on left hand side
239
int centerIndex = int(closestParmDistIndex[i].z);
'z' : field selection requires structure or vector on left hand side

'mat2x2' : no matching overloaded function found

uint k = 1103515245U; // GLIB C
'uint' : undeclared identifier
'k' : syntax error

303 for(int i=0; i < min(0,iFrame)+6; i++)
'min' : no matching overloaded function found
'+' : wrong operand types - no operation '+' exists that takes a left-hand operand of type 'const mediump float' and a right operand of type 'const int' (or there is no acceptable conversion)
'<' : wrong operand types - no operation '<' exists that takes a left-hand operand of type 'highp int' and a right operand of type 'const mediump float' (or there is no acceptable conversion)

39 vec2[2] activeSpheres;
'first-class array' : not supported
40 vec2[3] joints;
'first-class array' : not supported
...
1
activeSpheres[0] = activeSphereGrid(time);
'=' : dimension mismatch
'assign' : cannot convert from 'highp 2-component vector of float' to 'highp float'
242
activeSpheres[1] = activeSphereGrid(time+1.);
'=' : dimension mismatch
'assign' : cannot convert from 'highp 2-component vector of float' to 'highp float'
243
​
244
vec3 ta0 = sphereCenter(activeSpheres[0]);
'sphereCenter' : no matching overloaded function found
'=' : dimension mismatch
'=' : cannot convert from 'const mediump float' to 'highp 3-component vector of float'
245
vec3 ta1 = sphereCenter(activeSpheres[1]);
'sphereCenter' : no matching overloaded function found
'=' : dimension mismatch
'=' : cannot convert from 'const mediump float' to 'highp 3-component vector of float'

float env = smease(t/scenes[1],2.);
'scenes' : left of '[' is not of type array, matrix, or vector