Resolve warning "Zero Stiffness in Direction at Joint... Eqn. No..." and "Instability at joint"

1) Some columns are not intersected at the beams, so this leads to improper connectivity between the members. Select all structure and go to Geometry -> Intersecting Beams -> Intersect Selected Beams.

2) Don't release MX which allows the member to rotate along its longitudinal axis. MY and MZ releases should be enough.

1) Some columns are not intersected at the beams, so this leads to improper connectivity between the members. Select all structure and go to Geometry -> Intersecting Beams -> Intersect Selected Beams.

2) Don't release MX which allows the member to rotate along its longitudinal axis. MY and MZ releases should be enough.

Please go through following code,

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 01-Apr-20
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0.521001 3.80001 0; 2 13.19 5.15001 0; 3 0.521001 0 0; 4 13.19 0 0;
5 0 3.73001 0; 6 2.352 3.80001 7.80002; 7 15.021 5.15001 7.80002;
8 2.352 0 7.80002; 9 15.021 0 7.80002; 10 1.831 3.73001 7.80002;
11 0.521001 3.00001 0; 12 2.352 3.00001 7.80002; 13 13.19 3.00001 0;
14 15.021 3.00001 7.80002;
MEMBER INCIDENCES
2 1 11; 3 2 13; 4 2 1; 5 1 5; 6 6 12; 7 7 14; 8 7 6; 9 6 10; 10 1 6; 11 11 12;
12 13 14; 13 11 3; 14 12 8; 15 13 4; 16 14 9;
DEFINE MATERIAL START
ISOTROPIC STEEL
E 1.99947e+008
POISSON 0.3
DENSITY 76.8191
ALPHA 6e-006
DAMP 0.03
TYPE STEEL
STRENGTH FY 248210 FU 399894 RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY BRITISH
4 5 8 TO 10 TABLE ST UB406X178X74
2 3 6 7 13 TO 16 TABLE ST UC254X254X89
MEMBER PROPERTY EUROPEAN
11 12 TABLE ST 60X6.3SHS
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
3 4 8 9 PINNED
MEMBER RELEASE
11 START MP 0.95
11 END MP 0.95
12 START MP 0.95
12 END MP 0.95
LOAD 1 LOADTYPE None TITLE DL
SELFWEIGHT Y -1
MEMBER LOAD
4 5 UNI GY -3.2
8 9 UNI GY -4
LOAD 2 LOADTYPE None TITLE LL
MEMBER LOAD
4 5 UNI GY -4.8
8 9 UNI GY -6
LOAD 3 LOADTYPE None TITLE WL (P)
MEMBER LOAD
4 5 UNI Y -4.5
8 9 UNI Y -5.6
LOAD 4 LOADTYPE None TITLE WL (S)
MEMBER LOAD
4 5 UNI Y 4.5
8 9 UNI Y 5.6
LOAD 5 LOADTYPE None TITLE WL (Z)
MEMBER LOAD
10 UNI GX 2.7
LOAD 6 LOADTYPE None TITLE WL (X)
MEMBER LOAD
2 6 13 14 UNI GX 4.5
LOAD COMB 7 1.35DL+1.5LL
1 1.35 2 1.5
LOAD COMB 8 1.35DL+1.5WL(P)+1.5WL(Z)+1.5WL(X)
1 1.35 3 1.5 6 1.5 5 1.5
LOAD COMB 9 0.9DL+1.5WL(P)+1.5WL(Z)+1.5WL(X)
1 0.9 3 1.5 5 1.5 6 1.5
LOAD COMB 10 1.35DL+1.5WL(S)+1.5WL(Z)+1.5WL(X)
1 1.35 4 1.5 5 1.5 6 1.5
LOAD COMB 11 0.9DL+1.5WL(S)+1.5WL(Z)+1.5WL(X)
1 0.9 4 1.5 5 1.5 6 1.5
LOAD COMB 12 1.0 (DL+LL)
1 1.0 2 1.0
LOAD COMB 13 1.0 (DL+WL(P)+WL(Z)+WL(X))
1 1.0 3 1.0 5 1.0 6 1.0
LOAD COMB 14 1.0 (DL+WL(S)+WL(Z)+WL(X))
1 1.0 4 1.0 5 1.0 6 1.0
LOAD COMB 15 1.0 (DL+LL+WL(P)+WL(Z)+WL(X))
1 1.0 2 1.0 3 1.0 5 1.0 6 1.0
LOAD COMB 16 1.0 (DL+LL+WL(S)+WL(Z)+WL(X))
1 1.0 2 1.0 4 1.0 5 1.0 6 1.0
PERFORM ANALYSIS PRINT STATICS CHECK
PARAMETER 1
CODE EN 1993-1-1:2005
TRACK 2 MEMB 2 TO 9 13 TO 16
SGR 1 MEMB 2 TO 9 13 TO 16
UNL 1.3 MEMB 4 5 8 9
CHECK CODE MEMB 2 TO 9 13 TO 16
PRINT MEMBER FORCES LIST 2 TO 9 13 TO 16
PRINT SUPPORT REACTION LIST 1 TO 5 8 9
FINISH

What's the issue with this code?